Cutter.



No. 669,555. Patented Mar. 12, 1901.

V T. M. SIMPSON.

C U T T E R.

(Application filed Apr. 18, 1899.)

(No Model.)

:IIIjIIIIIIflIC ZL 16 WW THOMAS M. SIMPSON, OF STEUBENVILLE, OHIO.

CUTTER.

SPECIFICATION forming part of Letters Patent No. 669,555, dated March12, 1901.

4 Application filed April 13, 1899. serial No. 712,958. (No model.)

To all whmn it may concern.-

Be it known that I, THOMAS M. SIMPSON, a citizen of the United States,residing in Steubenville, county of Jeiferson, State of Ohio, haveinvented certain new and useful I1nprovements in Machines for CuttingOval Openings in Mat-Board or other Like Material, of which thefollowing is a specification.

I attain these objects by the mechanism shown in the accompanyingdrawings, in which Figure 1 is a plan view of the mat-cutter. Fig. 2 isan end view of the same. Fig. 3 is r a front view of the carrier andangle-plate with the cutter-holder. Fig. 3 is a side view of the sameFig. 4 is a front view of angleplate and attachable holder. Fig. r is aside view of such plate, showing transverse angle of holder to that ofangle-plate 0. Fig. 5 is an end View of trammel-blocks. Fig. 5 is a sideview of the same.

A is a disk having its edge undercut to reduce the diameter of the same.The upper face of the disk has formed in it two dovetailed diametricalgrooves, such grooves cross ing at right angles to each other. Securedto slide in these grooves (one in each groove) are the dovetailedtrammel-blocks O O each block fitting in the groove and having its endsundercut to correspond to the undercut sides of the disk. Each block isalso provided with a pivot-pin projecting from the center of the block,the pivot-pins being screw-threaded at their ends and provided withthumb-nuts D to engage and hold the radius-bar on such pivot-pins.

F is a radius-bar and is provided at the left i of its center with theholes G to fit over the which the carrier may be clamped to the bar atany desired point.

O is an angle-plate pivoted to the face of the carrier by thepivot-screw I and provided with the set-screw K as a means to secure itin any adjusted position. The angle-plate bears the knife-holder M. Theknife L is held in the holder by the hinged clamp P, with which theset-screw N, carried by the holder, engages. This clampis provided withan eye or hook at its upper end, in which the bar 1) may be inserted asa lever to raise or lower the clamp and knife.

If desired, the clamp P may be dispensed with and the knife or cutterused in the attachable holder engaged and clamped, as shown in Figs. 3,3, 1L, and P.

The disk is secured in place to hold down the material to be cut by thescrews E, which pass through the disk and engage the table or supportbeneath. Instead of the screws E I may use a telescoping rod, (shown indotted lines, Figs. 1 and 2,) which passes through an aperture in thedisk and is secured to the support by screws passing through eyes formedin the ends of the rod. To cut a circular opening, the bar F isdisengaged from one pivot-pin and the slideblock bearing the otherpivot-pin is secured to the center of the disk.

I claim 1. The combination of the undercut disk having diametricaldovetailed grooves cut in its face, such grooves crossing at rightangles to each other, with dovetailed trammelblocks carrying pivot-pinsand fitted to slide in the grooves of the disk and having their endsundercut to correspond to the undercut sides of the disk, a radius-barhaving a series of holes to receive the pivot-pins of the blocks, acarrier sliding on such bar and provided with means to engage the same,an angleplate pivoted to such carrier and provided with a knife orcutter holder, and means whereby said angle-plate may be adjusted andclamped to said carrier.

2. The combination of the undercut disk having diametrical dovetailedgrooves cut in its face, such grooves crossing at right angles to eachother, with dovetailed trammelwhereby said angle-plate may be adjusted10 and clamped to said carrier, a knife or cutter in such holder, andmeans to raise or lower such knife or cutter.

THOMAS M. SIMPSON.

Witnesses:

HARRY G. SIMPSON, W. MOD. MILLER.

